Boyesen Rad Valve Honda Cr250 2003 Moto-9 Flex Redesigned instep and Achilles accordion

Redesigned instep and Achilles accordion flex zones construction for superior comfort

450 EXC-F 10-11

Higher resistance of turning the fork legs: Self-inhibition of the fork tubes in both directions

KTM 450 EXC 2004-2009

Boyesen Rad Valve Honda Cr250 2003 Moto-9 Flex Redesigned instep and Achilles accordionThe Boyesen Rad Valve features a sophisticated array of performance attributes designed to provide peak horsepower gains, durability, and model specific performance for each make model year machine. Each Boyesen RAD Valve is unique tailor made to that model, year and displacement. With the new RC2 Rad Valve System, Boyesen engineers have created a lineage of aerodynamic intake technology by refining the primary performance factors required to increase